Divider wall for firebox grates



R. K. CLZ'QHUSS DIVIDER WALL FOR FIREBOX GRATES June 12, 1951 3 Sheets-Sheet 1 Filed Dec. 20, 1946 lure/11in /6 E bert [1131.155

.1 110 Hwy! June 12, 1951 c uss 2,556,750

DIVIDER WALL FOR FIREBOX GRATES 3 Sheets-Sheet 2 Filed Dec. 20, 1946 June 12, 1951 R. K. CLAUSS 2, 7

' DIVIDER WALL FOR FIREBOX GRATES Filed Dec. 20, 1946 3 Sheets-Sheet 3 Patented June 12, 1951 UNITED STATES PATENT OFFICE DIVIDER WA L FOR IR BOX G ATES Robert K. Clauss, Weissport, Pa.

Application December 20, 1946, Serial No. 717,560

10 Claim 1 This invention relates to cooking stoves and more particularly to an appliance for installation therein whereby only a half portion of the usual fire box need be used and a corresponding fire bed required, this being especially desirable in warm weather when the stove is used only for cooking purposes.

'- ;An important object of the invention is to proso as to reduce the siz of the firebox chamber to abou onel o its o ma p c W i e at the same time providing means for directing the heat into the stove pipe proper in a manner to secure the greatest efliciency from th reduced hea u ce Still another object of the invention is to provide an appliance of the character stated including a unit for heat retention, which will maintainv the area above the unused part of th stove rate this bein ccomplish y s n t hot products of combustion to pass through this area enroute to the stove proper.

A further object of the invention is to provide an appliance of the character stated which can be readily assembled and also readily taken apart for the purpose of cleaning or replacement of parts.

These and variou other objects and advantages of the invention will become apparent to the reader of the following description.

In the drawings:

Figure l is a ;fragmentary perspective view shOWing the appliance installed with the stove proper shown in broken lines.

Eigure 2 is an enlarged fragmentary exploded perspective view showing a top plate, a bottom plate and an arch wall all forming part of the invention.

Figure 3 is an enlarged fragmentary vertical sectional view of the apparatus shown in Figure 1 but with a modified ventilating unit illustrated therein.

Figure 4 is a vertical transverse view of a slightly modified form of the invention incorporating a heat retainer, the upper plate and arch wall not being shown in this view.

F e 5 s a f a m tary p sp ti e e lode view of certain elements shown in Figure .4.

Fi e 6 s a er p c i v e of a stool orm n a part of the invention.

Figure 7 is a perspective view showing the bottom side of a modified form of one of the heat retainer plates.

Figure 8 is a fragmentary perspective view of a modified s ruct re showin a m dified form of heat retainer installed.

Figure 9 is a fragmentary perspective view of a portion of the arch wall used in the subject matter shown F ure ,8.

equipped with nuts Figure 10 is ,a persp ctive vi w of th e t retaining unit shown in Figure ,8.

Figure 11 is a fragmentary cross section through the structure shown i gur Figure 12 is a fragmentary perspective view show n th bo tom side of one of the hor zontal plates of the heat retainer shown in F gures 8, 1.0 and 11.

Referring to the drawings, Figure l discloses a conventional cooking stove generally referred to by numeral 5 and the same having the usual lids 6 and to one side of this stove is a firebox l, at the bottom of which is a doubly undulated type grate 8, the inner half of which is to be blocked off by the installation of the present inyention which is generally referred to by nueral The structure denoted by numeral 9 consists of ,a vertically extending arch wall ll] of suitable refractory material having an upwardly and inwardly inclined top and upwardly and inwardly inclined slotted lugs ll projecting from the top of this Wall l0 and under a top plate l2 to receive bolts l3 which extend downwardly through openings M in the plate l2 and which bolts are Ma which are tightened against the underside .of the lugs II to hold the top plate [2 in the inclined position shown in Figure l.

The wall 10 is formed of vertical columns l5 bridged by web portions It, the web portions I6 terminating above the lower ends of th columns I5 to form arches I! through which the burnt products of combustion pass. The lower portions of the columns I5 have rearwardly projecting and apertured lugs 18 for receiving bolts 19 which extend downwardly through slots 20 in the adjacent longitudinal edge of a base plate 2|, the bolts l9 being equipped with nuts 22 which are tightened on the bolts and against the underside of the lugs It .to hold the base plate 2| in horizontal position. A ventilator shell 23 is vertically disposed in the firebox and extends from the front to the rear and the upper edge of the top plate I2 abuts the upper portion of this shell, while between the shell and the adjacent stove pro-per is a firebox liner 2V4. Shutters 25 are provided in the upper portion of the liner 24, while a damper 26, controlled by a manually operated rod 21 and handle 28 is provided in the forward wall 23a of the case 23.

The top 2.9 of the firebox, of course overlies the assembly 9 and the hot products of combustion can rise and pass over the assembly 9 as well as pass through the same. Extending from an eye 30, which may be attached to the case'23, i a, tie wire or the like 31, which is passed through an opening 32 in the adjacent edge portion .of the base plate 2! to support the same in conjunction with the bolts l9.

The hot products of combustion pass not only through the archways I1, but also through perforations 33 in the web portions 16 of the arch wall II].

It can here be seen that the fire bed is located only on the left half side of the grate 8 as viewed in Figure l, the hot products of combustion passing upwardly over the assembly 9 as well as through the assembly 9. Numeral 34 denotes a Water front having inlet and outlet pipes 35, 36 respectively, this forming a wall at the outer side of the fire compartment opposite the arch wall ID. The ventilating case 23, as shown in Figure 3, may take the form of a ventilating unit generally referred to by numeral 31 which consists of a plurality of vertically spaced horizontal slats 38 inclined upwardly toward the firebox liner 24 transversely and maintained in vertically spaced relation by spacer tubes 39 located on tie bolts 49 passing upwardly through the slats 38 and through a frame member 4| at the top, this structure having a, longitudinal cap 42 disposed over the same the vertical wall of which has openings 43 therein.

A heat retainer unit generally referred to by numeral 44 may be employed between the ventilator unit and the arch wall 10, this unit consisting of a top plate 45', a plurality of upwardly and outwardly slanting bafiie plates 46 and a stool 41. There is a lowermost bafile plate 48, interposed between the lower plate 46 and the stool 41. The stool 41 has side wall 49 and there are openings in the baffle plates 48, 45 for the reception of tie rods 50 Which extend vertically and through the top plate 25 and the bottom of the stool 41, these rods having tubular spacers i thereon for properly spacing the bafiie plates from the top 45, from each other and above the stool 41, it being seen that the lower edges of the plates 46, 4-8 have downwardly and outwardly slanting edge portions 52, 53, the edge portions 52 having depending spacer blocks 54 for rest upon underlying edge portions 52 and the edge portions 53 of the lowermost baflie plate 48.

The top plate '45 has depending spacer lugs 55 for resting the same upon the uppermost baffle plate 46 and also notched lugs 56 which catch under the edge portion of the uppermost baffle plate 46 and one end of the slot '5'] therein. (See Figures 4 and 5.)

With this heat retainer unit 44 a somewhat modified form of ventilating unit generally referred to by numeral 58 is employed, this unit having a cap 42a similar to the cap 42 in Figure 3. The unit 58 is made up Of a plurality of vertically spaced horizontal slats 59 through which tie bolts 69 extend, these tie bolts having spacer tubes 6| thereon for spacing the slats 59 equal distances apart. Downturned end portions 62 are provided on the slats 59 at their portions opposed to the unit 44.

The stool 41 may take the form shown in Figure 6 wherein the bottom is denoted by numeral 63, this bottom having a plurality of longitudinally extending slots 64 therein. Risers 55 are provided at the ends and intermediate points on the bottom 63 and have slanting outer portions upon which the inclined edge 53 of the bottom baiiie plate 4-8 can rest.

The bottom of the lowermost bafile plate 48, which in Figure '7 is modified, and which is de noted by reference character 481; has ribs 66 for resting the same upon the risers 65. This utilization of ribs 65 may be carried out in all of the bafiles 46, if desired.

In Figures 8, 10, 11 and 12, a modified form of heat retainer is shown, the same consisting of a plurality of horizontal plates 61 each perforated and each having opening 68 through which tie rods 69 are disposed for securing these plates together in one unionized assembly.

The bottom portion of each plate 61 is provided with depending bosses 19 (excepting the lowermost plate 61) for resting the same upon its underlying plate and for maintaining the plates properly vertically spaced.

In the form of the invention as illustrated in Figure 11, the arch wall Illa has a ledge 18a or a plurality of lugs, to which the heat retainer unit is secured by its lowermost plate 61 by bolts 18b or the like. It is also preferable that the lowermost plate have its edge opposed to the arch wall lfla formed with a plurality of spaced notches II. a

A handle or other means 12 may be provided on the top plate 61 to permit easy removal of the unit. The wall Illa is provided with vertical colurns 15a which do not extend to the bottom thereof. Archways Ila are provided in the wall [0a below each of the columns l5a.

In the form of the invention shown in Figure 11, a ventilating unit generally referred to by numeral 13 is employed, this having slanting slats l4, vertically spaced and constructed similarly to the ventilator disclosed in Figure 3.

It can now be seen that the arch wall, top plate, ventilating assembly and heat retaining unit may be used together, or without the heat retaining unit.

In the operation of the apparatus, the fire is built on the left side of the grate as viewed in Figures 1 and 8, thus saving coal that would be ordinarily burned on the right side of the grate. To capture the heat and properly direct the same toward the stove proper and to also retain a considerable amount of this heat in the area of the firebox above that part of the grate not being used for supporting a fire bed, the hot products of combustion pass through the arch wall l0, both through the arch opening I! and the openings 33 and into the ventilator case 23 or through the fins of one of the ventilator units described, before this hot products of combustion enters the stove proper. In other words the hot products of combustion are momentarily retained in the appliance, thus preventing the same from rapidly passing to the flue and this heat is retained in more volume by the presence of one of the heat retaining units 44 or 61.

While the foregoing description sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and some of the invention as claimed hereinafter.

Having described the invention, what is claimed as new is:

1. In a firebox, a grate, a divider wall extending along and resting on the grate, between which and one side wall of the firebox a fire bed is formed, said wall having openings therethrough through which hot products of combustion can pass, a ventilating unit at the remaining side wall of the firebox, and said unit having gas admitting means through which said hot products of combustion pass.

2. In a firebox, a grate, a divider wall extending along and resting on the grate, between which and one side wall of the firebox a fire bed is formed, said wall having openings therethrough through which hot products of combustion can pass, a ventilating unit at the remaining side wall of the firebox, said unit having gas admitting means through which said hot products of combustion pass, and a removable top plate extending from the top of the divider wall to said ventilating unit.

3. In a firebox, a grate, a divider wall extending along and resting on the grate, between which and one side wall of the firebox a fire bed is formed, said wall having openings therethrough through which hot products of combustion can pass, a ventilating unit at the remaining side wall of the firebox, and said unit having gas admitting means through which said hot products of combustion pass, said divider wall being in the form of vertical columns connected by web portions, the lower portions of the web portions having arch-like openings therethrough.

4. In a firebox, a grate, a divider wall extending along and resting on the grate, between which and one side wall of the firebox a fire bed is formed, a ventilating unit at the remaining side wall of the firebox, said unit having gas admitting means, said divider wall being in the form of vertical columns connected by web portions, the lower portions of the web portions havin arch-like openings therethrough, and said web portions being further formed with vertically spaced openings therethrough between the columns, whereby hot products of combustion can pass through said spaced openings and then through said gas admittin means.

5. In a firebox, a grate, a divider wall extending along and resting on the grate, between which and one side wall of the firebox a fire bed is formed, said wall having openings therethrough through which hot products of combustion can pass, a ventilating unit at the remaining side wall of the firebox, and said unit having gas admitting means through which said hot products of combustion pass, said divider wall being of refractory material.

6. In a firebox, a grate, a, divider wall extending along and resting on the grate, between which and one side wall of the firebox'a fire bed is formed, said wall having openings therethrough through which hot products of combustion can pass, a ventilating unit at the remaining side wall of the firebox, and said unit having gas admitting means through which said hot products of combustion pass, and a heat retainer unit over the grate portion between the divider wall and the ventilatin unit.

7. In a firebox, a grate, a divider wall extending along and resting on the grate, between which and one side wall of the firebox a fire bed is formed, said wall havin openings therethrough through which hot products of combustion can pass, a ventilating unit at the remaining side wall of the firebox, said unit having gas admitting means through which said hot products of combustion pass, and a heat retainer unit over the grate portion between the divider wall and the ventilating unit and positioned in communication with said openings and said gas admitting means, said heat retaining unit being composed of a plurality of vertically spaced and perforated plates between which the hot products of combustion pass in travelin from the fire bed at one side of the divider wall, through the wall to reach the ventilating unit.

3. In a firebox, a grate, a divider wall extending along and resting on the grate, between which and one side wall of the firebox a fire bed is formed, said wall having openings therethrough through which hot products of combustion can pass, a ventilating unit at the remaining side wall of the firebox, said unit having gas admittin means through which said hot products of combustion pass, and a heat retainer unit over the grate portion between the divider wall and the ventilating unit and positioned in communication with said openings and said gas admittin means, said heat retaining unit being composed of a plurality of vertically spaced and perforated plates between which the hot products of combustion pass in traveling from the fire bed at one side of the divider wall, through the wall to reach the ventilating unit, and supporting means on the divider wall for the heat retaining unit.

9. In a firebox, a grate, a divider Wall extending along and resting on the grate, between which and one side wall of the firebox a fire bed is formed, said wall having openings therethrough through which hot products of combustion can pass, a ventilating unit at the remaining side wall of the firebox, said unit having gas admitting means through which said hot products of combustion pass, and a heat retainer unit over the grate portion between the divider wall and the ventilating unit and positioned in communication with said openings and said gas admitting means, said heat retaining unit being composed of a plurality of vertically spaced and perforated plates between which the hot products of combustion pass in traveling from the fire bed at one side of the divider wall, through the wall to reach the ventilating unit, said plates of the heat retaining unit being separable.

10. In a firebox, a grate, a divider wall extending along and resting on the grate, between which and one side wall of the firebox a fire bed is formed, said wall having openings therethrough through which hot products of combustion can pass, a ventilating unit at the remaining side wall of the firebox, said unit having gas admitting means through which said hot products of combustion pass, and a heat retainer unit over the grate portion between the divider wall and the ventilating unit and positioned in communication with said openings and said gas admitting means, said heat retaining unit being composed of a plurality of vertically spaced and perforated plates between which the hot products of combustion pass in traveling from the fire bed at one side of the divider wall, through the wall to reach the ventilating unit, said plates of the heat retaining unit being separable, and being set on an incline sloping downwardly toward the divider wall.

ROBERT K. CLAUSS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 452,344 Farwell May 12, 1891 480,276 Pakas Aug. 9, 1892 593,213 Hamilton Nov. 9, 1897 741,192 Travis Oct. 13, 1903 1,367,502 Empson Feb. 1, 1921 2,271,816 Dewitt Feb. 3 1942 

